Chuck.



A. P. moimow.

CHUCK.

APPLICATION FILED MAYH. 191x.

1,159,247. Patented N0V.2,1915.

9 ,4, Fig] 3, C5

v 2 7 Z0 9 i 4 Fig.3 J0 7 49 3 now, a citizen of the United States,residing I at Elmira, inthe'county of Chemung and" State of New York,have inventedcertain' S Q ES TEN is ALEXANDER P.- MORROW, OF ELMIRA, NEWYORK, ASSIGNOR TO EQHORTON & SON COMPANY, OF WINDSOR LOCKS, CONNECTICUT,A CORPORATION OFICONNECTICUT.

I CHUCK.

1,159,247. Original application filed December 23,

To all whom it may concern:

Be it known that I, ALEXANDER P. Monnew and-useful Improvements inChucks, of which the following is a'specification.

My invention relates to chucks having sliding jaws which grasp and'holdthe shank of a drill or other tool, this application being a divisionofmy application filed December 23, 1908, Serial 150.46%),025. No claim ismade herein to the generic invention set forth-and broadly claimedin'my' said application, the claimsof-this application beingdirected toa species of the invention which is shown but not specifically claimedin that application.

' In using chucks,the jaws frequently be-.

come so set under, the resistance offered the drill by the work that itis exceedingly difficult to releaseand retract the jaws and considerablepower is expended, time lost, and inconvenience experienced in startingthe re-' leasing action of the chuck.

The object of my inventionis to provide simple and eflicient meanswhereby the jaws may be easily and quickly caused to relax their gripand then recede with the expenditure of less power and exertion'than haspreviously been required to accomplish that result.

One construction wlierein the object of my invention is attained isillustrated in the outer tubular body or case- 1; which has a smoothbore and the usual frusto-conical portion 2 constructed withlongitudinal slots to receive the jaws 3. The jaws are confined in thelongitudinal slots by a cap 4 and they may be provided with marginalribs along ,their'upper edges engaging recesses .along the upper marginsof the slots to aid in hold- 1911. Seria1NoL 6 26,502."

Specification of Letters Patent. H Patented NOV. 2,1915.

1908, Serial No. 469.025. Divided-and this'application filed llltay 11;

- ing them'inplace and effecting their move inenttoward-and from theaxis of the chuck. twill beunderstood that the jaws are held againstaxial "movement independently 1 of the head,'hereinafter described, andthat the caslng isgiven axial movement relative'to the head to eflectthe closing and opening movements of the jaws. y H

"Within the tubular body 1 is an internally threadedsleeve 5, and anexternally thread ed head, 6, the forward portion of said head beingsmo'oth to form a'spindle journaled'in the boreofthe body and formedwith an annular flange 7 at its end which is engaged by the hook-likeends 18 .of the jaws. The

threaded portions of the sleeve and the head engage, as shown, andpermit relative longi-' tudinal movement of said sleeve and head.

One or more radial pins 9 are secured in the body or case and engagecircumferential grooves or slots 10 in the sleeve'5 which are disposedat an angle to the axis of the chuck somewhat greater than the threadsin the sleeve. It will be readily understood that if the body or case 1be rotated, the pins 9 will be, carried against the sides of the slots10, which are inclined. relative'to the axis of the chuck, and,consequently, the case will be given an axial movement relative to thehead which movement will be limited by cpntact of the pins with, theends of the s ots.'; i

It will be seen that while the jaws can not be moved relative to the"head 6 in an axial direction, the casing 1 and the part 4 may be movedaxially; relative to the jaws. When. the jaws areto be opened or closed,

the ca'si'ngisirotated a'ndithe head is held stationary, or. viceversa;The jaws being closed, asillustrated in'Fig. 1, if the case 1 be rotatedcounter-clockwise '(looking in the direction of the arrow), it will movefreely around the sleev'ebuntil the pins 9 engage the ends of the slots'10,whereup n the continued rotationof the case will cause the sleeve torotate therewith on the head,

The travel of the pins against the inclined walls of the slots efl'ec'tsan 7 axial move ment 'of'the casewhile the sleeve remains stationary, sothat an initial radial releasing movement will be imparted tothe jawsPrior tothe rotarymovement of the sleeve on the head. When the ends ofthe slots are engaged by the pins'9, this independent or quick releaseof the jaws, the inclined walls of the slots acting on the pins ascamsto cause the movement and the ends of the slots constituting stops tolimit the same. The power required to start the screw is, consequently,reduced and the manipulation of the chuck made easy and rapid from theinitial or starting point to the end of the operation.

It is to be understood that my improvements are applicable to otherforms of chucks, and that the particular chuck shown is merelyillustrative and not restrictive. It is also to be understood thatwithin the scope of the appended claims minor changes may be made indetails of construction without departing from the spirit of theinvention. v

, Having thus described my invention, what I claim and desire to secureby Letters Patent is:

1. In a chuck, the combination with a rotatable case, and jaws movableradially by axial movement of the case relative to the jaws, of a headwithin the case con nected with the jaws and having rotary and axialmovement relative to the case, a sleeve engaging the head and havingrotary and axial movement relative thereto, and connections between thecase and the sleeve for effecting an initial limited relative movementof the case prior to the movement of the sleeve on the head.

2. In a chuck, the combination with a case and jaws movable radially byaxial movement of the case relative to the jaws, of a member havingaxial movement-relative to the case and jaws, a'member fixed againstaxial movement with relation to the jaws and having threaded engagementwith said axially movable member, and a cam and stop device connectingthe case and said movable member, the cam being disposed at a greaterangle to the axis of the member than the threads thereon, whereby thecase will have a partial movement independent of the member to initiallyrelax the jaws andwill then actuate the member to fully open the jaws. a

3. In a chuck, the combination of a head provided with an annularflange, jaws engaging said flange and movable radially to and fromtheaxis of the head, a case journai'a'on the head and apeiaevuyconnected --to--the jaws to move the same radially by axial movement ofthe case relative to the jaws, a sleeve mounted on the head androtatable thereon and movable axially rela tively thereto, and meansconnecting the sleeve and the case for initially slightly moving thecase axially as it is rotated.

4:. In a chuck, the combination of a case, ahead therein provided withan annular flange, jaws engaging the annular flange and movable radiallytoward and from the axis of the head, the case being rotatable andmovable axially relatively to the head and operatively connected to thejaws to move the same radially by its own axial movement, and meansincluding a cam between the head and the case formoving the case axiallyas it is rotated.

5. In a chuck, the combination of a case, jaws movable radially by axialmovement of the case relative to the jaws, a head fitted in the case andengaged by the jaws, a sleeve threaded upon the head and having acircumferential cam slct, and a pin carried by the case and engagingsaid slot.

6.- In a chuck, the combination of a threaded head, jaws arrangedradially about the axis of the head, means on the head for holding thejaws against endwise movement relative thereto, a rotary threaded sleevesection engaged with the head and movable axially thereof during itsrotation, and means engaged by said sleeve section and by the jaws forimparting radial movement to the jaws by the axial movement of thesleeve section, said means having a limited rotary and axial movementrelatively to the sleeve section for releasing the jaws from theirgripping position. j

7. In a chuck, the combination of a head, jaws movable radially to andfrom the axis of the head, means for holding the jaws against axialmovement relative to the head, a case journaled on the head andoperatively connected to the jaws to move the same radially by axialmovement of the case relative to the jaws, a sleeve'mounted on the headand rotatable thereon and movable axially relative thereto, and meansconnecting the sleeveand case for initially moving thecase axially as itis rotated.

8. In a chuck, the combination of a case, a head therein, jaws movableradially toward and from the axis of the head, means for holding thejaws against axial movement relative to the head, the case beingrotatable and movable axially relative to the head and operativelyconnected to the jaws to move the same radially by its own axialmovement, and means including a cam between the head and the case formoving the latter axially as it is rotated.

9. In a chuck, work engaging means and operating means thereforcomprising two movable, interconnecting parts to receive and to conveymotion in causing engagement and release of the work-engaging means, andincluding an outer longitudinally movable case, said parts havingengaging means to effect a joint movement in tightening and releasingthe work, and whereby one of said parts is movable with respect to theother by a predominating, relatively fast movement, to effect initialrelease of the work-engaging means, and whereby the other of said partsis movable with respect to the first by a subsidiary, relatively slowmovement, to finally tighten the hold of the work-engaging means.

10. In a chuck, work-engaging means and operating means thereforcomprising two movable, interconnecting parts to receive and to conveymotion in causing engagement and release of the work-engaging means, andincluding an outer longitudinally movable case and longitudinallystationary jaws, said parts having engaging means to effect a jointmovement in tightening and releasing the work, and whereby one of saidparts is movable with respect to the otherby a predominating, relativelyfast movement, to effect initial release of the work-engaging means,

and whereby the other of said parts is movable with respect to the firstby subsidiary, relatively sloW movement, to finally tighten the hold ofthe Work-engaging means.

11. In a chuck, work-engaging means and operating means thereforcomprising two movable interconnecting parts consisting .of an outercase, a shell whereon it is mounted, a threaded head upon which saidshell is rotatably mounted, and jaws connected to said head andouter'case, to receive and to convey motion in causing engagement andrelease of the work-engaging means, said parts having engaging means toeffect a joint movement in tightening and releasing the work,and'whereby one of said parts is movable With respect to another by apredomi' nating, relatively "fast movement, to effect initial release ofthe work-engaging means,- and whereby said other ofsaid parts 18 movablewith respect to the first by a subsidiary,

relatively slow movement, to finally tighten the hold of thework-engaging means.

In testimony whereof I affix my signature, in presence of two witnesses.v V

' ALEXANDER P. 'AOR'EOWV.

Witnesses: v v p H. W. PATON, FLORENCE T. Fosrnn.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. G.

